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If you do not see
the particular setup you need please phone us or e-mail
your requirements |
How to work out which load
arrestor you require:
All models tell you all you need to know, LA300-12 for example, LA = Load
Arrestor, 300 = the maximum load the arrestor can be used for and -12 is the
cable length in metres that can be used. All you then need to specify is your
activation speed, for this unit you have a choice of 0.3, 0.5 and 1.0 metre per
second. This means for a load up to 300kgs with a cable length of 12 metres and
an activation speed of 0.5 metres per second your order would be for an LA300-12
0.5m/s.
If you need a longer cable length this may be able to be achieved if the
arrestor is for instance being fixed higher than the load. You still only need
12 metres to recoil into the housing but are 3 metres above the load constantly
you would then need to order a LA300-12+3 and the activation speed. The extra
cable length is limited by the increased weight of the cable as this if too much
will stop the unit from retracting the wire rope, for lengths over 4 metres
please talk to our technical department.
Load is doubled and cable length halved if the unit has a
pulley, so an LA300-12 becomes an LA600-6P, all pulley units can
only have activation speeds of 0.5 metres per second. This is
because they use a 1.0 metre per second spring but because the
wire rope travels double the distance the operating speed is 0.5
metres per second.
Load Arrestor General Information
The Sala range of Industrial Load Arrestors are safety
devices used in conjunction with lifting devices, such as cranes
and hoists. The arrestor provides independent protection that
will arrest the fall of a load in the event of the primary
system failing and being completely independent of the primary
lifting system it reduces the risk of equipment damage and
protects personnel in and around the danger zone.
A range of arrestors in each of the three series is available
to protect loads from 100kgs to 3000kgs with a variety of wire
rope lengths based on the three model sizes, small, medium and
large. The arrestors can also be used in conjunction with other
arrestors of the same size to be able to achieve a desired
working load capacity. For instance three LA3000-7.5P could be
used to protect a load of 9000kgs, this makes them very
versatile. The use of multiple units should be discussed with
our technical team as there must be sufficient distance to allow
the other unit to activate.
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The adjacent picture shown shows how two load arrestors can be
used together to achieve the higher working load than one unit
can manage.
The load arrestor is
installed adjacent to the primary lifting device and fixed to a
suitable anchorage point. Its retractable steel rope is then
secured to the load. The wire rope is attached to the arrestor
via an internal spring loaded drum that keeps the rope under a
constant light tension yet allows unrestricted movement of the
protected load.
In the event of a
failure of the primary lifting device that allows the load to
fall or descend too quickly, the arrestor senses a descent speed
in excess of its setting of either, 0.3, 0.5 or 1.0 metre per
second and automatically engages an internal inertia activated
mechanical brake that acts on the rope drum. This decelerates
and stops the lowering of the suspended load within a minimum of
100mm to a maximum distance of 1300mm and absorbs the shock
forces. |
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Installing a Load
Arrestor in cramped conditions may be overcome by using a
pulley. The arrestor must always be installed so that the wire
rope operates straight from the drum to the pulley as shown in
the picture below, with both drum and pulley rotating in the
same direction and with the path of the rope following the curve
or coil of the rope. Do not allow the rope to be coiled in the
opposite direction.
Using a pulley in this
manner so as to ensure a straight run into the unit in you can
still choose all available operating speeds for the unit you
require. |
For anchorage requirements please refer to the chart below:
Whilst each range of
load arrestor works in the same way there physical size and
weight are very different. Each range has been designed so that
there is no lag in the activation speed by only offering a
limited number of pawls, so the Small has 4, the Medium 6 and
the Large 8. This ensures that the unit detects and activates as
soon as the over speed is detected. Detailed below are the
technical drawings for each unit.- Small Load Arrestor Drawings
- Medium Load Arrestor Drawings
- Large LA Drawings
Small Range Load Arrestors |
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The Sala small range Load Arrestors offers protection to a
load from 10kgs up to a maximum of 500kgs. The units can have an activation
speed of 0.3, 0.5 or 1.0 metre per second. Each unit requires an anchorage at
the unit and at the payload. Please refer to the how
to calculate the anchorage chart.
The small range units weigh 8.4kgs and have a
working length from 5 to 12 metres with galvanised
cable diameters from 5 to 7mm. Special units can be
ordered if what you need is not detailed please talk
to our technical department. |
| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| Sala LA300-12 - for
loads from 10 to 300kgs using 5mm wire |
£1178.10 |
N/A |
£45.00 |
| Sala LA400-8 - for
loads from 20 to 400kgs using 6mm wire |
£1171.00 |
N/A |
£45.00 |
| Sala LA500-5 - for
loads from 50 to 500kgs using 7mm wire |
£1176.10 |
N/A |
£45.00 |
| Sala LA500-5+2 - for
loads from 50 to 500kgs using 7mm wire |
£1209.15 |
N/A |
£45.00 |
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Small Range Load Arrestors with
Pulley |
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The Sala small range Load Arrestors with pulleys offer protection to a load from
20kgs up to a maximum of 1000kgs. The units have an activation speed of 0.5
metres per second. Each unit requires an anchorage at the unit and at the payload. Please refer to
the how to calculate the anchorage chart.
The small range units weigh 8.4kgs with the
pulley weighing 8.2kgs, they have a working length
from 2.5 to 6 metres with galvanised cable diameters
from 5 to 7mm. Special units may able to be ordered,
if what you need is not detailed please talk to our
technical department. |
| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| Sala LA600-6P - for
loads from 20 to 600kgs using 5mm wire |
£1493.30 |
N/A |
£45.00 |
| Sala LA800-4P - for
loads from 10 to 800kgs using 6mm wire |
£1486.20 |
N/A |
£45.00 |
| Sala LA1000-2.5P - for
loads from 10 to 1000kgs using 7mm wire |
£1491.30 |
N/A |
£45.00 |
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Medium Range Load Arrestors |
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The Medium Range Load Arrestors offers protection to a load from 100kgs up to a
maximum of 1500kgs. The units have an activation speed of 0.5 or 1.0 metre per
second.
This unit requires an anchorage at the unit and at the payload.
Please refer to the "how to calculate the anchorage chart".
The Medium Range units weigh 42kgs and have a
working length from 5 to 20 metres, with galvanised
wire from 7 to 11mm. Unless specified differently
the unit has an activation speed of 0.5 metres per
second. Special units can be ordered if what you
need is not detailed please talk to our technical
department. |
| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| Sala LA500-20 - for
loads from 100 to 500kgs using 7mm wire |
£4631.86 |
N/A |
£55.00 |
| Sala LA800-17 - for
loads from 100 to 800kgs using 8mm wire |
£4556.99 |
N/A |
£55.00 |
| Sala LA1000-12 - for
loads from 100 to 1000kgs using 9mm wire |
£4552.20 |
N/A |
£55.00 |
| Sala LA1000-14.13 - for
loads from 100 to 1000kgs using 9mm wire |
£4609.30 |
N/A |
£55.00 |
| Sala LA1500-5 - for
loads from 100 to 1500kgs using 11mm wire |
£4541.05 |
N/A |
£55.00 |
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Medium Range Load Arrestors with
Pulley |
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|
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The Sala Medium Range Load Arrestors with pulleys offer protection to a load
from 100kgs up to a maximum of 3000kgs. The units have an activation speed of
0.5 metres per second. Each unit requires an anchorage at the unit and at the payload. Please refer to
the how to calculate the anchorage chart.
The Medium Range units weigh 42kgs with the
pulley weighing 18kgs, they have a working length
from 2.5 to 10 metres with galvanised cable
diameters from 7 to 11mm. Special units may able to
be ordered, if what you need is not detailed please
talk to our technical department. |
| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| Sala LA1000-10P- for
loads from 100 to 1000kgs using 7mm wire |
£4908.71 |
N/A |
£55.00 |
| Sala LA1600-8.5P - for
loads from 100 to 1600kgs using 8mm wire |
£4895.30 |
N/A |
£55.00 |
| Sala LA2000-6P - for
loads from 100 to 2000kgs using 9mm wire |
£5116.00 |
N/A |
£55.00 |
| Sala LA2000-7.05P - for
loads from 100 to 2000kgs using 9mm wire |
£5129.27 |
N/A |
£55.00 |
| Sala LA3000-2.5P - for
loads from 100 to 3000kgs using 11mm wire |
£4912.96 |
N/A |
£55.00 |
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Large Range Load Arrestors
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The Large Range Load Arrestors
offers protection to a load from 200kgs up to a
maximum of 1750kgs. The units have an activation speed of 0.5 or 1.0 metre per
second. This unit requires an anchorage at the unit and at the payload.
Please refer to the how to calculate the
anchorage chart.
The Large Range units weigh 105kgs and have a
working length from 13 to 30 metres, with galvanised
wire from 9 to 12mm. Unless specified differently
the unit has an activation speed of 0.5 metres per
second. Special units can be ordered if what you
need is not detailed please talk to our technical
department. |
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| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| LA1000-30 - for loads
from 200 to 1000kgs using 9mm wire |
£13901.60 |
N/A |
£75.00 |
| LA1300-20 - for loads
from 200 to 1300kgs using 10mm wire |
£12717.36 |
N/A |
£75.00 |
| LA1500-15 - for loads
from 200 to 1500kgs using 11mm wire |
£12666.43 |
N/A |
£75.00 |
| LA1750-13 - for loads
from 200 to 1750kgs using 12mm wire |
£12852.47 |
N/A |
£75.00 |
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Large Range Load Arrestors with
Pulley |
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The Large Range Load Arrestors with pulleys offer protection to a load from
200kgs up to a maximum of 3500kgs. The units have an activation speed of 0.5
metres per second. Each unit requires an anchorage at the unit and at the
payload. Please refer to the how to calculate the
anchorage chart.
The Large Range units weigh 105kgs with the
pulley weighing 25kgs, they have a working length
from 6.5 to 15 metres with galvanised cable
diameters from 7 to 11mm.
Special units may able to be ordered, if what you
need is not detailed please talk to our technical
department. |
| Description: |
Sales: |
Weekly Hire: |
Servicing: |
| LA2000-15P - for
loads from 200 to 2000kgs using 9mm wire |
£15309.60 |
N/A |
£75.00 |
| LA2600-10P - for loads
from 200 to 2600kgs using 10mm wire |
£14125.36 |
N/A |
£75.00 |
| LA3000-7.5P - for loads
from 200 to 3000kgs using 11mm wire |
£14074.43 |
N/A |
£75.00 |
| LA3500-6.5P - for loads
from 200 to 3500kgs using 12mm wire |
£14260.47 |
N/A |
£75.00 |
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